All swimming equipment is on sale with a 20% discount. A snorkeling set regularly sells for $50. Find the discount.

$40

$41.67

$60

$10

The discount on the snorkeling set, which regularly sells for $50, is $10 (20% of $50).

Therefore, the discounted price of the snorkeling set would be $50 - $10 = $40.

So, the correct answer is $40.